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All Journal International Journal of Advances in Applied Sciences JURNAL KIMIA SAINS DAN APLIKASI TELKOMNIKA (Telecommunication Computing Electronics and Control) Tadris: Jurnal keguruan dan Ilmu Tarbiyah Agrointek Eksergi: Chemical Engineering Journal Bulletin of Chemical Reaction Engineering & Catalysis Jurnal IPTEK KOVALEN: Jurnal Riset Kimia Jurnal Pendidikan: Teori, Penelitian, dan Pengembangan J-PEK (JURNAL PEMBELAJARAN KIMIA) JC-T (Journal Cis-Trans): Jurnal Kimia dan Terapannya Jurnal Rekayasa Bahan Alam dan Energi Berkelanjutan Al-Kimia Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Chemistry Indonesian Journal of Chemical Research Prosiding Seminar Nasional Sains dan Teknologi Terapan Jurnal Fisika : Fisika Sains dan Aplikasinya Fullerene Journal of Chemistry Jurnal Karinov Stannum : Jurnal Sains dan Terapan Kimia Jurnal Ilmiah Farmako Bahari Indonesian Journal for Social Responsibility Jurnal Graha Pengabdian Reforma: Jurnal Pendidikan dan Pembelajaran JoEMS : Journal of Education and Management Studies Jurnal Ilmiah Ibnu Sina (JIIS): Ilmu Farmasi dan Kesehatan Journal of Disruptive Learning Innovation (JODLI) Journal of Engineering Science and Technology Jurnal Teknik Kimia dan Lingkungan Jurnal MIPA dan Pembelajarannya Bulletin of Chemical Reaction Engineering & Catalysis Prosiding Seminar Nasional Pengabdian kepada Masyarakat (SINAPMAS) Jurnal Terapan Pendidikan Dasar dan Menengah Jurnal Akademika Kimia Frontier Advances in Applied Science and Engineering Jurnal Konstatering
Sumari Sumari
Universitas Negeri Malang
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Synthesis of Biodiesel from Refined Waste Cooking Oil with Active Natural Zeolite Santoso, Aman; Sumari, Sumari; Asrori, Muhammad Roy; Wele, Amonius Regino
Indonesian Journal of Chemical Research Vol 11 No 3 (2024): Edition for January 2024
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2024.11-ama

Abstract

This research evaluates refining waste cooking oil with active natural zeolite, utilizes it for biodiesel synthesis, and characterizes the synthesized methyl ester. This experimental laboratory research was carried out: (1) activation of natural zeolite, (2) refining waste cooking oil with active natural zeolite, (3) determination of free fatty acid (FFA) content of the oil, (4) transesterification with KOH catalyst, (5) characterization of the synthesized methyl esters according to the SNI 7182:2015, and (6) identification of the methyl ester component by GC-MS. The results showed that the FFA content of the refined waste cooking oil using active natural zeolite with concentrations of 10%, 20%, and 30% per mass of oil were 2.97, 2.0, and 1.56%, respectively. The yield of methyl ester transesterified with various concentrations of KOH (0.8, 1.0, and 2% per mass of oil), respectively, were 80.13, 85.34, and 74.98%. The synthesized methyl ester resulted in the characteristics: 0.867 g/mL of density; 5.72 cSt of viscosity; 1.449 of refractive index; 1.46 g KOH/g of acid number; and 0.023% of water content. Identification of GC-MS obtained the synthesized methyl esters, which include: 46.10% of methyl hexadecanoic, 41.68% of methyl 9-octadecanoic, 6.42% of methyl octadecanoic, and 5.80% of methyl eicosanoic.
Pengaruh Jenis Alkohol pada Sintesis Alkil Ester dari CPO melalui Reaksi Transesterifikasi Menggunakan Katalis Heterogen CaO-MgO Santoso, Aman; Rizky, M; Sumari, Sumari; Wijaya, Anugrah Ricky; Retnosari, Rini; Asrori, Muhammad Roy
Jurnal Rekayasa Bahan Alam dan Energi Berkelanjutan Vol. 5 No. 1 (2021)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rbaet.2021.005.01.01

Abstract

Low quality CPO can be made alkyl esters by transesterification reaction by alcohol. The type of alcohol that is often used in the transesterification reaction is methanol but is toxic, so we need an alternative type of alcohol. The purpose of this research is the synthesis of alkyl esters from CPO through transesterification reaction using heterogeneous catalyst CaO-MgO with different types of alcohol. This experimental laboratory research through stages:  CPO refinement, activation of CaO-MgO catalysts,  synthesis of alkyl esters from CPO with two types alcohol, identification of the components of the synthesis compound of the synthesized alkyl ester mixture using GC-MS. The results showed that (1) alkyl esters can be synthesized from CPO through the transesterification reaction with methanol and CaO-MgO catalysts with a yield of 85.72%, while the transformation of ethanol is difficult to form ethyl ether (2) the character of methyl ester synthesized has a density 0.86 g / mL, viscosity 3.23 cSt, refractive index 1.44819, and acid number 0.747 mg KOH / g methyl ester, (3) the main component of the synthesized alkyl ester contains 1,200% methyl myristic compound, methyl palmitate 40,637% methyl linoleate 9.332%, methyl 7-octadecenoate 42.986%, and methyl stearate 4.427%.
Concentration Effect of MgO/K2O Catalyst on Transesterification of Castor Seed (Ricinus communis) Oil Aman Santoso; Sumari Sumari; Muhammad Roy Asrori; Irsyadatun Ni’mah
Stannum : Jurnal Sains dan Terapan Kimia Vol 6 No 2 (2024): October 2024
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v6i2.4692

Abstract

Fatty acid methyl esters can be obtained from the synthesis of vegetable oil with methanol using a base catalyst. Vegetable oil has the potential as biodiesel feedstock, the methyl ester character of various vegetable oils is different as from castor seed oil. Synthesis of methyl esters by transesterification reaction with the addition of a heterogeneous catalyst, namely MgO/K2O. The purpose of this study was to synthesize methyl esters from castor seed oil with MgO/K2O catalyst and to determine the yield and character. The research went through 6 stages which included (1) isolation of castor seed oil, (2) determination of free fatty acid (ALB) levels of castor seed oil, (3) manufacture of MgO/K2O catalyst (4) esterification of castor seed oil with H2SO4 catalyst (5) transesterification of jatropha seed oil with methanol and various variations in the concentration of the catalyst MgO/K2O 1%, 2%, 3%, (6) characterization of the synthesized methyl ester which includes tests of density, viscosity, acid number, refractive index and moisture content. The results showed that the concentration of MgO/K2O had an effect on the synthesis of methyl esters from castor seed oil, where the optimization condition was achieved at a concentration of 2% MgO/K2O with a yield of 97.99%. The methyl ester character which is synthesized from castor seed oil with a 2% MgO/K2O catalyst is having a density of 1.0244 g/mL, a viscosity of 22.531 cSt, an acid number of 2.81 g KOH/g methyl ester, a refractive index of 1.456, and a moisture content. 0.035%.
Optimalisasi Pemahaman Materi Piramida Makanan melalui “MIRAMA”: Media Interaktif Piramida Rantai Makanan Pada Kelas VII SMP Laboratorium UM Munzil, Munzil; Santoso, Aman; Sumari, Sumari; Muntholib, Muntholib; Agustina, Nur Indah; Fitriana, Nurin
Jurnal KARINOV Vol 7, No 3 (2024): September
Publisher : Institute for Research and Community Service (LP2M), Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um045v7i3p182

Abstract

Penelitian ini bertujuan memberdayakan guru MGMP Kimia se-Kabupaten Sumenep melalui Edukit berbasis PhET Interactive Simulator untuk meningkatkan kualitas pembelajaran kimia submikroskopik, yang sering menjadi tantangan dalam memahami konsep abstrak. Program ini mengadopsi pendekatan penyuluhan dan pelatihan, memberikan materi serta praktik langsung penggunaan PhET dan SiPERU, sehingga guru mampu mengintegrasikan teknologi secara optimal dalam pembelajaran digital. Hasil survei menunjukkan bahwa 72,5% dari 51 responden menilai PhET dan SiPERU sangat mudah digunakan (skor 5), 25,5% memberi skor 4, dan hanya 2% memberi skor 3, tanpa skor di bawah itu. Mayoritas guru merasa media ini sangat membantu dalam mempermudah pembelajaran kimia. Selain itu, survei kualitas penyampaian materi oleh narasumber menunjukkan 80,4% responden memberikan skor 5 dan 19,6% skor 4, mengindikasikan penyampaian yang sangat efektif. Program ini berhasil meningkatkan kompetensi guru dalam menyampaikan konsep submikroskopik melalui media digital, sekaligus meningkatkan kepercayaan diri mereka dalam mengintegrasikan teknologi ke dalam pembelajaran. Dampak positif lainnya adalah terciptanya modul ajar berbasis media digital, memperkuat pendekatan pembelajaran sepanjang hayat, dan menjawab tantangan pendidikan modern. Program ini memiliki potensi untuk diperluas melalui pendampingan berkelanjutan dan kolaborasi lebih luas dengan berbagai pihak untuk memastikan dampak yang lebih signifikan dan berkelanjutan. Kata kunci— MGMP, PhET, SiPERU, Pembelajaran Sepanjang Hayat Abstract This study aimed to empower chemistry teachers in the Subject Teachers’ Forum (MGMP) of Sumenep Regency through the implementation of a chemistry teaching toolkit based on the PhET Interactive Simulator. The program focused on enhancing the quality of submicroscopic-level chemistry teaching, which often presents challenges in understanding abstract concepts. The initiative employed a combination of workshops and training sessions, providing materials and hands-on practice with PhET and SiPERU to enable teachers to integrate technology optimally into digital learning. Survey results indicated that 72.5% of 51 respondents rated PhET and SiPERU as very easy to use (score 5), 25.5% gave a score of 4, and only 2% assigned a score of 3, with no scores below 3. The majority of teachers found these tools highly effective in facilitating the teaching of chemistry. Furthermore, a survey on the effectiveness of the trainers showed that 80.4% of respondents gave the highest score (5) for clarity and ease of understanding, while 19.6% rated them with a score of 4, reflecting highly effective delivery. This program successfully improved teachers' competence in conveying submicroscopic concepts through digital media while boosting their confidence in integrating technology into instruction. Additional positive outcomes included the development of digital teaching modules, strengthening lifelong learning approaches, and addressing modern educational challenges. The program holds potential for expansion through ongoing support and broader collaborations to ensure more significant and sustainable impacts. Keywords— MGMP, PhET, SiPERU, Life Long Learning
Pelatihan Pengambangan Bahan Ajar Kimia Berbasis Blended Learning Menggunakan Media Pembelajaran Quizizz dan Mentimeter bagi Guru SMA di Kota Malang Pramesti, Indah Nur; Ciptawati, Endang; Nur, Hadi; Sumari, Sumari; Aldwinarta, Farrel Hafiz; Fauziah, Putri Nanda; Nareswari, Tsalis Jauza
Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Vol. 7 No. 2 (2023): Vol 7, No 2 (2023)
Publisher : Yogyakarta State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jpmmp.v7i2.58029

Abstract

E-learning yang dipadukan dengan pembelajaran konvensional merupakan definisi blended learning dan merupakan salah satu metode pembelajaran yang sering diterapkan pasca pandemi Covid-19. Blended learning disertai dengan media pembelajaran yang menarik akan mampu meningkatkan hasil belajar siswa. Kegiatan layanan ini bertujuan untuk menarik guru agar terampil dalam menggunakan Quizizz dan Mentimeter, platform survei online dan presentasi interaktif. Hasil pelatihan menunjukkan respon positif dari peserta terhadap media pembelajaran yang direkomendasikan. Sebanyak 63% peserta menyatakan pelatihan ini sangat bermanfaat, 37% peserta menyatakan metode blended learning sangat efektif dilaksanakan pasca pandemi Covid-19, dan 56% peserta menyatakan penggunaan aplikasi media pembelajaran online Quizizz dan Mentimeter membantu dalam pelaksanaan blended learning.
Investigating Learners' Conceptual Progression on pH of Solution, Acid-Base Titration, and Buffer Solutions Santa, Eldat Wira; Sumari, Sumari; Nur, Hadi; Setiawan, Nur Candra Eka; Muntholib, Muntholib
Tadris: Jurnal Keguruan dan Ilmu Tarbiyah Vol 9 No 2 (2024): Tadris: Jurnal Keguruan dan Ilmu Tarbiyah
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/tadris.v9i2.23169

Abstract

This study aims to explore the development of understanding of the concepts of pH, acid-base titration, and buffer solutions among 11th-grade students and 2nd- and 4th-semester university students in chemistry education. It employs a cross-sectional design using open-ended questions and interview guidelines to collect data from 153 11th-grade students, 30 second-semester university students, and 40 fourth-semester university students. The open-ended questionnaire consists of 9 items (2 questions on the pH of solutions, 4 questions on acid-base indicators and titration, and 3 questions on buffer solutions and salt hydrolysis) on a continuous scale, with an Aiken's kappa validity of 0.61 (substantial agreement) and a Cronbach's Alpha reliability (KR-20) of 0.75 (acceptable). The results indicate that scientific understanding of pH concepts, such as the pH of solutions, acid-base titration, and buffer solutions, improves with education. However, comprehension of complex concepts remains low. The study's implications highlight the need for curriculum development and the selection and implementation of learning strategies that enable students to learn in a structured, gradual, and coherent manner. Curriculum development should map out subject matter, distinguish essential from non-essential content, and organize material from simple and essential topics to more complex and non-essential ones.
Pengetahuan, Sikap, dan Praktik Apoteker Komunitas dalam Pemantauan Pengobatan Pasien Tuberkulosis di Provinsi dengan Prevalensi Tuberkulosis Tinggi di Indonesia Mardhiyyah, Cut Ainul; Zuniarto, Ahmad Azrul; Ryansyah, Hardi; Amanatin, Alfitia Dwi; Antonia, Vonny; Sumari, Sumari
Jurnal Ilmiah Farmako Bahari Vol 16 No 2 (2025): Jurnal Ilmiah Farmako Bahari
Publisher : Faculty of Mathematic and Natural Science, Garut University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52434/jifb.v16i2.42294

Abstract

Indonesia ranks second globally in tuberculosis (TB) cases, with West Java identified as a high-burden TB region. Community pharmacists, often the first point of patient contact, have the potential to support TB monitoring. However, their role remains underutilized and understudied. This study aimed to evaluate community pharmacists' knowledge, attitudes, and practices (KAP) in monitoring TB medication, and to examine the relationships among these variables and respondent characteristics. A cross-sectional study was conducted among 419 pharmacists across 27 districts and cities in West Java Province. Data were collected via a validated online questionnaire comprising KAP domains. Descriptive statistics, Spearman’s correlation, and Chi-Square tests were used to analyze relationships between KAP scores and demographic/professional characteristics. Community pharmacists demonstrated moderate knowledge in TB treatment (14.94 ± 1.99), generally have a positive attitude towards the importance of their role and ability to monitor use of TB drug (21.6 ± 3.3). In practice, community pharmacists are low in reporting, monitoring, and providing assistance related to TB patients (10.7 ± 5.2). Significant but low correlations were observed between knowledge and attitude (r = 0.110, p = 0.024), knowledge and practice (r = 0.116, p = 0.018), and attitude and practice (r = 0.343, p < 0.001). Practice scores were significantly associated with access to patient consultation services (p < 0.001), while knowledge was linked to pharmacy location (p = 0.032), and attitude to gender (p = 0.026). Although community pharmacists in West Java show sufficient knowledge and positive attitudes, their involvement in TB monitoring practices remains limited. Targeted education and policy interventions are essential for their engagement in national TB control efforts.
Study of Inhibition DNA Polymerase by Phenolic Compounds in Traditional Food Spices on the Polymerase Chain Reaction Process Fadila Abna Swari; Suharti, Suharti; Evi Susanti; Eli Hendrik Sanjaya; Sumari, Sumari
Frontier Advances in Applied Science and Engineering Vol. 1 No. 1 (2023)
Publisher : Tinta Emas Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59535/faase.v1i1.108

Abstract

Polymerase Chain Reaction (PCR) is a repeated cycle process including denaturation, annealing and extension using the DNA polymerase enzyme. This identification method is based on specific DNA which increases the number of DNA strands millions of times. The aim of this study was to identify and classify phenolic group compounds in traditional food spices that have the potential to inhibit DNA polymerase and their mechanism of action in the PCR process. The observation made was the Literature Review study as an analytical test method regarding the study of DNA polymerase inhibition by phenolic group compounds in traditional food spices in the PCR process. The results of this study were analyzed from several appropriate literature studies showing that most of the spices in traditional foods contain secondary metabolites of phenolic group compounds. These compounds have been shown to inhibit DNA polymerase in the PCR process, one of the mechanisms is to bind to the active site of DNA polymerase which causes decreased activity and deactivates DNA polymerase. Moreover, it can degrade and denaturate DNA polymerase. This makes it difficult to identify haram substances in processed food products using PCR.
Engineering and Application of Fe-TiO2/MOR Zeolite Photocatalysts for the Photodegradation of Methylene Blue Dye Waste Sholikah, Liqanatul Putri; Sumari, Sumari; Permatasari, Suryani Indah
KOVALEN: Jurnal Riset Kimia Vol. 11 No. 1 (2025): August Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2025.v11.i1.17427

Abstract

The use of dyes such as methylene blue is widespread. However, if methylene blue is discharged without prior treatment, it can lead to pollution problems. In this study, the engineering of zeolites and the degradation mechanism of methylene blue using Fe-TiO2/MOR zeolite as a photocatalyst were investigated. XRD characterization results revealed that Fe-TiO2/MOR zeolite has a crystalline phase. Based on XRF characterization, the percentage of Fe and Ti significantly increased, indicating the successful immobilization of TiO2 and doping of Fe3+ into the zeolite structure to form a composite. The morphological analysis of the Fe-TiO2/MOR zeolite composite showed a rough surface, which could affect its surface area. The Fe-TiO2/MOR zeolite photocatalyst has a band gap of 3.08 eV, allowing it to absorb visible light more efficiently. The study on the application of methylene blue photodegradation using Fe-TiO2/MOR zeolite as a photocatalyst demonstrated higher degradation efficiency compared to using inactivated, non-immobilized, and undoped mordenite zeolite. With an optimal mass of 0.03 grams, a contact time of 90 minutes, and a pH of 10, the percentage of degraded methylene blue reached 98.91%. The Fe-TiO2/MOR zeolite composite has the potential to be used as a photocatalyst in methylene blue photodegradation reactions.
Optimization of Palm Bunch Ash-Based Catalysts for the Transesterification of Waste Cooking Oil into Biodiesel Sakhi, Fillah M.; Santoso, Aman; Sumari, Sumari
Jurnal Akademika Kimia Vol. 14 No. 1 (2025)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2025.v14.i1.pp40-50

Abstract

The increasing dependence on fossil fuels to meet fuel needs has caused several problems, such as air pollution, greenhouse effects, unpleasant odors, and loud noises. This research aims to design an alternative fuel in the form of biodiesel by applying a heterogeneous catalyst based on palm bunch to synthesize biodiesel through transesterification. The research stages include activating the active sites of palm bunches through calcination at temperatures of 400 °C, 500 °C, and 600 °C; refining waste cooking oil; esterification; and transesterification. The active components of palm bunch ash (PBA) were characterized using XRF and alkalinity testing. XRF results indicated that PBA contains active basic compounds such as K₂O and CaO, crucial in catalytic activity. Physical-chemical property testing revealed that the synthesis achieved the highest yield of 93.744 %. The results of the physical-chemical characteristic tests produced the best density with an average of 0.888 g mL⁻¹, and the lowest viscosity with an average of 3.79 cSt at 40 °C with an iodine number of 80.116 g I₂ 100 g⁻¹, a saponification number of 170.57 mg KOH g⁻¹, and a refractive index of 1.445. The catalyst demonstrated stable performance up to three reuses with yields ranging from 80–90 %. FTIR spectra showed strong absorption bands at 1172–1165 cm⁻¹, indicating C-O-CH₃ stretching from methyl esters. GC-MS analysis showed that the biodiesel consists of various fatty acid methyl esters (FAME), with the main component being methyl oleate, which appears at a retention time of 37.096 minutes with an area of 40.31 %. So it is shown that PBA catalysts have an excellent potential for commercial applications as they can reduce dependence on fossil fuels by utilizing household waste.
Co-Authors A. Alif Mardianto Adilah Aliyatulmuna Agus Budianto Agustina, Nur Indah Aldwinarta, Farrel Hafiz Aman Santos Aman Santoso Amanatin, Alfitia Dwi Andyka Medarda Pradana Annida Elfiana Citra Ardianty Antonia, Vonny Anugrah Ricky Wijaya Ciptawati, Endang Cylindrica, Vrisca Bella Dedek Sukarianingsih Devi Indrasari Mustopa Putri Dinar Rachmadika Baharintasari Dinar Rachmadika Baharintasari Dwi Ratna Wulandari Effendy Effendy Eli Hendrik Sanjaya Endang Budiasih Evi Susanti Fadila Abna Swari Faizah, Siti Farashinta Nadia Fauziah, Putri Nanda Fauziatul Fajaroh FITRIYAH, IDA Ganden Supriyanto Habiddin Hadi Nur Hadi Nur Hadi Nur Handoko Darmokoesomo I Wayan Dasna Ida Bagus Suryadarma Ida Bagus Suryadharma Ima Rosyida Indah Nur Pramesti Irsyadatun Ni’mah Izzah, Dewi Jalinan Jacky Anggara Nenohai Januarti, Wenny Kelvert Kong Kinanthi, Bilqis Rahma Lailatul Ilmiyah Lailatur Rizqiyah Liqanatul Putri Sholikah Ma'ruf, Umar Mahmudah, Siti Nur Mardhiyyah, Cut Ainul Mardianto, A. Alif Marfu'ah, Sitti Margaret Pandaleke Mauliana Nursafitri Maya Sari Muhammad Roy Asrori Mukhamad Nurhadi, Mukhamad Muntholib Munzil Nareswari, Tsalis Jauza Nazriati Nazriati dkk. Ni’mah, Irsyadatun Novi Andriani Novi Andriani, Novi Nur Arief Nugroho Nur Indah Agustina Nurin Fitriana Nursafitri, Mauliana Permatasari, Suryani Indah Prakasa, Yana Fajar Priska Yohanita Sodanango Purbo Suwasono Putri Hapsari, Mamila Putri Qori Utami Rachman, Ihsan Budi Ratna Kusumawardani, Ratna Retnosari, Rini Ridwan Joharmawan Rizky, M Rohman Fantusi Rohman Fantusi Ryansyah, Hardi Sakhi, Fillah M. Santa, Eldat Wira Santosa Santosa Setiawan, Nur Candra Eka Sholikah, Liqanatul Putri Siew Fan Wong Sin Yuan Lai Sin Yuan Lai Sinta Nur Laila Siti Marfuah, Siti Siti Marfu’ah SRI RAHAYU Suharti Suryani Indah Permatasari Syafiuddin Syafiuddin Teguh Wirawan Vrisca Bella Cylindrica Wahyu S. Pambudi Wahyu Setyo Pambudi Wele, Amonius Regino Wiwin Dwi Nurpitasari Yahmin Yahmin Yana Fajar Prakasa Yana Fajar Prakasa Yudhi Utomo Yulianto, Andik Yulisya Zuriatni Yuneta Dwi Yunisari Zelen Surya Minata Zhiying Zhu Zuniarto, Ahmad Azrul